THE EFFECT OF OXYTOCIN MASSAGE ON THE SMOOTHNESS OF BREAST MILK IN POSTPARTUM MOTHERS IN THE WORK AREA OF THE LUMUT HEALTH CARE CENTRAL TAPANULI DISTRICT IN 2021. JIA [Internet]. 2022 Jan. 14 [cited 2026 Jan. 10];13(2). Available from: https://jurnal.polkesri.ac.id/index.php/JIA/article/view/387